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8535029 Scroll type compressor having reinforced fixed scroll  
A scroll type compressor has a rotary shaft, a fixed scroll member, a movable scroll member and a rib. The fixed scroll member has a fixed end plate and a fixed scroll wall. The fixed end plate has...
8529232 Compressor having capacity modulation system  
A compressor includes first and second scroll members, a structure supporting the second scroll member, and a first piston. The first scroll member includes a first end plate and a first spiral...
8528506 Rotary internal combustion engine  
A rotary internal combustion engine including: a cylinder having a cylinder circumferential wall provided with a horizontal valve groove on its inner circumferential surface; a working shaft...
8528518 Rotary piston for a rotary piston engine and rotary piston engine  
The invention relates to a rotary piston engine, in particular a rotary engine of trochoidal design, with a side disk (4) on the exhaust side and a rotary piston (6) with at least of one, and...
8529233 Displacement machine with improved support  
A displacement machine of spiral-type construction for a compressible medium includes a displacement body having a carrier disc and helical blades extending out from both sides of the carrier disc....
8529235 Oscillating variable displacement ring pump  
An oscillating variable displacement ring pump provides both positive and variable displacement. A housing circumscribes a pump chamber. The pump chamber encases an oscillating ring driven by a...
8528505 Rotary internal combustion engine  
A rotary internal combustion engine including: a cylinder having a cylinder circumferential wall provided with a horizontal valve groove on its inner circumferential surface; a working shaft...
8529231 Apparatus for cleaning rotation body and vacuum pump having the same  
An apparatus includes a rotation body having one or more rotary shafts having projections, and a cleaning part disposed adjacent to the projections, having one or more rotation holes into which the...
8529234 Water injection type screw fluid machine  
A water-lubrication type screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft. The bearing is...
8523548 Screw compressor having a gate rotor assembly with pressure introduction channels  
A single-screw compressor includes a casing, a screw rotor accommodated in the casing, a gate rotor, and a gate rotor supporting member rotatably supporting the gate rotor. The gate rotor includes...
8523534 High-pressure pump for supplying fuel to an internal-combustion engine  
A high-pressure pump for supplying fuel to an internal-combustion engine has a pump body and an actuating shaft which extends along a longitudinal axis and which is supported rotatably about the...
8523545 Stator to housing lock in a progressing cavity pump  
A reinforcing interface between the stator and its housing in a progressing cavity pump is created from ribs extending inwardly into the stator from the housing inner wall that can be...
8523546 Cycloid rotor engine  
A rotary engine has a cycloid rotor and a sealing grid including a face seal that rotates with the rotor, and including other seals that do not rotate with the rotor. As the rotor rotates within a...
8523544 Three stage scroll vacuum pump  
A three stage vacuum pump has three stages of fixed scrolls and orbiting scrolls that operate simultaneously. A motor drives the second orbiting scroll within the third fixed scroll upon three...
8523547 Rotary engine expansion chamber apparatus and method of operation therefor  
An engine is described for operation on a fuel expanding about adiabatically in a power stroke of the engine. To aid the power stroke efficiency, the rotary engine contains one or more of a rotor...
8523519 Steam turbine rotor and alloy therefor  
An alloy suitable for use in a rotor, such as one or more regions of a steam turbine rotor, as well as a forged rotor formed with the alloy. The alloy consists of, by weight, 0.20 to 0.30% carbon,...
8517703 Compressor including valve assembly  
A compressor hub assembly may include a hub member, a valve retainer and a valve member. The hub member may include first and second portions. The first portion may define an annular hub wall for a...
8517702 Rotary compressor with enhanced sealing between mode switching device and chamber thereof  
A rotary compressor is provided, in which an inner diameter of a connection hole connected to a vane chamber and an outer diameter of a connection tube inserted into the connection hole are...
8517708 Fuel pump with axial slide gap  
A fuel pump includes an impeller and a cover. The impeller includes a ring portion, which is annular and is placed radially outward of blades. The cover has an arcuate pump flow passage. An...
8517704 Compressor having capacity modulation system  
A compressor includes first and second scroll members, a piston and a control valve. The first scroll member includes an end plate defining a capacity modulation passage. The first and second...
8517701 Multistage vacuum pump  
A multistage vacuum pump has a pair of rotors disposed in each of pump chambers connected in stages. As the rotors rotate while intermeshing, a suctioned gas is compressed and discharged, angles of...
8517707 Method for converting energy from compressed air into mechanical energy and compressed air motor therefor  
A method for converting energy from compressed air into mechanical energy, and a compressed air motor therefor. The motor includes a shaft rotor and a counterpart rotor which intermesh with each...
8517706 Non-eccentric engine  
The present invention is an apparatus that includes a chamber rotor with a chamber and an extension rotor with an extension. The rotors are housed in a rotor case. A pressure cavity is at least...
8517705 Rotary engine vane apparatus and method of operation therefor  
A rotor engine is provided for operation with a fuel expanding during a power stroke. To aid power stroke efficiency, the rotary engine contains a vane, where a tip of the vane includes one or more...
8512016 Positive-displacement dry pump  
The present invention provides a dry pump including: a center cylinder which includes: a plurality of pump chambers containing an upper stage pump chamber that communicates with an intake port and...
8511277 “Turbomotor” rotary machine with volumetric expansion and variants thereof  
A “TurboMotor” positive displacement rotary-piston machine comprises a casing having an annular working chamber and intake and exhaust ports, two drive shafts coaxial with the annular surface def...
8512017 Compression mechanism and scroll compressor including the same  
A compression mechanism is configured to be used in a scroll compressor. The compression mechanism includes a fixed scroll and a movable scroll. One of the fixed scroll and the movable scroll is a...
8512018 Gear pump with pressure relief groove  
A hydraulic device has an inlet side and an outlet side and includes two meshing cogwheels. Each cogwheel has external oblique teeth and is arranged between an inlet side and an outlet side. At...
8512006 Hydraulic pump with variable flow and pressure and improved open-loop electric control  
The present invention is a variable displacement pump system for delivering precisely controlled oil flow and pressure, including a variable displacement pump having an inlet passage, an outlet...
8512019 Screw compression apparatus  
In a screw compression apparatus in which shaft sealing members (13, 14) isolate a bearing space (7, 8) from a rotor chamber (5) and a lubricating fluid separating collector (3) separates the rotor...
8510968 Turbine and air knife assembly  
A paint drying booth includes a plurality of walls, a ceiling, and an access door for egress and ingress. A turbine generates heated compressed air which is delivered to the interior of the booth...
8505703 Eccentric gearing type clutch  
An eccentric gearing type clutch includes a housing connected to, and for rotation with, a drive shaft; at least one set of rotors, each set of rotors having two parallelly arranged rotors...
8506269 Low noise type balance shaft module  
A balance shaft module equipped with a dual pump including a main oil pump and a sub-oil pump may include a pump rotor rotatably coupled to a housing, a discharge space formed in the housing for...
8506271 Scroll machine having axially biased scroll  
A compressor includes a shell, a compression mechanism, and an axial biasing system. The shell defines a first passage forming a first discharge passage. The compression mechanism includes first...
8506270 Variable displacement vane pump  
A variable displacement vane pump including a relief valve which includes a valve bore, a spherical valve element in the valve bore, a valve seat fixed onto one axial side of the valve bore and...
8506272 Scroll compressor lubrication system  
A lubricant metering system for a compressor may include a cap, a cap cage, and a shaft. The cap may include an outer surface, a first recess, and a first radial bore extending between the first...
8506263 Vacuum pump  
A vacuum pump is provided comprising a pumping mechanism, a drive shaft for driving the pumping mechanism and a gear box connected to the drive shaft for rotating the drive shaft. Pressure control...
8500424 Screw compressor with a sound dampening device that separates lubricant  
In order to improve a screw compressor comprising an outer housing, a compressor screw housing which is arranged in the outer housing and in which rotor bores for screw rotors are arranged, a drive...
8500414 Method of controlling a gear pump as well as an application of the method  
A method of controlling a gear pump comprising two meshing gear wheels (11, 12), wherein the two gear wheels (11, 12) are driven via respective shafts (2, 3) each by a drive unit (7, 8). A current...
8500423 Frame rotated hydraulic motor with improved parking brake  
A rotary fluid pressure device includes a gerotor gear set having a ring gear and a star gear orbitally moveable about a longitudinal axis relative to the ring gear. The star gear includes an...
8500422 Vacuum pump  
A vacuum pump housing comprises first (12) and second half-shell stator components (14) defining a plurality of pumping chambers separated by partition members (26, 28, 30, 32). Each pumping...
8500425 Roots pumps  
A Roots vacuum pump stator is arranged to house a pair of intermeshing rotors, said stator being characterized in that it comprises a director or deflector arranged to direct solid material...
8496303 Pump assembly  
A pump assembly including a housing, a pump unit having a low pressure portion and a high pressure portion and accommodated in a pump unit receiving portion which is formed in the housing, a...
8496457 Metering gear pump with integral flow indicator  
A gear pump includes a driven gear and an idler gear each mounted for rotation in a housing. The driven gear and the idler gear include respective gear teeth in a meshing relationship and forming...
8496444 Water-lifting pump apparatus and method of controlling operation thereof  
A water-lifting pump apparatus which is free of a discharge valve and a check valve, is low in cost, and is capable of reducing vibration and noise due to a waterfall after the end of water pumping...
8496456 Progressive cavity pump including inner and outer rotors and a wheel gear maintaining an interrelated speed ratio  
A progressive cavity pump includes at least one inner rotor with Z external threads and at least one outer rotor with Z+1 internal threads. The outer rotor has radial bearings at both ends, whereas...
8491695 Iron-base sintered part, manufacturing method of iron-base sintered part and actuator  
An iron-base sintered part having high density and totally enhanced strength, toughness and abrasion resistance, a manufacturing method of the iron-base sintered part, and an actuator are...
8491288 Geroller hydraulic motor with anti-cogging structure  
A hydraulic motor receives pressurized fluid from a source controlled by a human operator to convert the energy in the hydraulic fluid to a rotational output to propel a drive wheel of a machine....
8491289 Friction drive pump for transfer cases, etc  
A pump having an actuator mounted on a rotatable shaft, and a pump mounted on the shaft, which is selectively engageable with the actuator. When the actuator is actuated, the pump will receive...
8485802 Pump with multiple volume streams  
Disclosed is a pump for generating at least two volume flows having a different pressure. Said pump comprises a pump cover, a pump housing, and a wheel set that is eccentrically mounted therein....